There are 2 versions. Single button and multiple button versions. Please make sure you are buying the right one. Here are the part numbers.
51168202186 relocator with single buttons, non smoker
51168230902 relocator with single buttons, smoker
51167001408 relocator with control center buttons, non smoker
51167001410 relocator with control center buttons, smoker
Check out www.getbmwparts.com
for a picture of both versions (under E46 Fanatics section).